body {
  margin: 0;
  font-family: 'Segoe UI', 'PingFang SC', 'Hiragino Sans', 'Arial', sans-serif;
  background: #f5f5f5;
}
::-webkit-scrollbar {
  width: 8px;
  background: #f5f5f5;
}
::-webkit-scrollbar-thumb {
  background: #e0e0e0;
  border-radius: 4px;
} 